Adjustable scaffold support



July 17, 1956 c. L. HAUGHT ADJUSTABLE SCAFFOLD SUPPORT 5 Sheets-Sheet 1 Filed Jan. 25, 1952 M T n H E nu VU mm L E D F ATTORNEY July 17, 1956 c. L. HAUGHT 2,755,145

ADJUSTABLE SCAF'F OLD SUPPORT Filed Jan. 25, 1952 3 Sheets-Sheet 2 INVENTOR.

CLYDE 1.. HAUGHT I9 BY I1 m w. 20 MM W 4 ATTORNEY July 17, 1956 w c. HAUGHT 2,755,145

ADJUSTABLE SCAF'FOLD SUPPORT Filed Jan. 25, 1952 3 Sheets-Sheet 3 III/ INVENTOR.

CLYDE L. HAUGHT ATTORNEY United States Pfltflif 2,755,145 ADJUSTABLE scAFFoLn SUPPORT Clyde L. Haught, Akron, Ohio Application January 25, 1952, Serial No. 268,158

6 Claims. (Cl. 304-6) This invention reates to supports for scaffolding, and particularly scaffolding in which the foot-boards are adjustable to various heights. n

Here'tofo're, scaffolding supports in general use have beenlimited to a short range or vertical adjustments, usually requiring provision of a series of different sized supports, as for example, miniature," baby, low, medium, and high. H

One object of the invention is to provide an improved scaffold support which is vertically adjustable to support a ledger of different heights within a relatively wide range including substantially the full height of the support.

Another object of the invention is to provide a support of the character described in the preceding obje'ct, including releasable means for clamping a ledger thereon in a manner which eifectively braces the scaffold against collapse.

Still another object of the invention is to provide a support of the character described, including means thereon for positively mounting a ledger-supporting bracket in selectively adjusted positions. 7

These and other objects of the invention will be manifest from the following brief description and the accompanying drawings.

Of the accompanying drawings:

Figure l is a perspective view, partly in full and partly in chain-dotted lines, showing a scaffolding including four supports embodying the features of the invention.

Figure 2 is a front elevation of one of the scalfolding supports in ledger-supporting position.

Figure 3 is a view similar to Figure 2, illustrating the support in open position for vertical adjustment of a ledger bracket thereon. V

Figure'4 is a horizontal cross-section, taken substantially on the line 4-4 of Figure 2,

Figure 5 is a cross-section, taken substantially on the line 5-5 of Figure 2, showing a ledger-supporting bracket mounted on the support.

Figure 6 is a vertical cross-section taken substantially on the line 6-6 of Figure 5.

Figure 7 is a vertical cross-section taken substantially on the line 7-7 of Figure 5.

In Figure 1 there is illustrated a scaffold including four supports 10 embodying the features of the invention, in pairs thereof, each pair supporting a ledger 11, and the lodgers in turn supporting a plank or foot-board 12.

Referring generally to Figures 1 to 7, each support may include a pair of oppositely disposed braces 13 and 14 having oppositely inwardly spaced vertical channels 15 and 16, respectively, pivoted at the lower ends thereof, as indicated at 17, and supporting legs 18 and 19, respectively, diverging downwardly andlaterally outwardly from adjacent the top of the braces and adapted to support the hinge point 17 slightly elevated from the supporting surface. The braces are suitably reinforced by struts 20, 20 and 21, 21. V I

An .elongatedledger-supporting bracket 22 'may be vertically adjustably mounted between the spaced braces 7 2,755,145 resented July 17, 1956 2 1 3 and 14, and also adapted to lock the braces in position with the webs or walls 23 and 24 of the vertical channels 15 and 1 6, respectively, in spaced parallelism,

as best shown in Figure 2. Accordingly, the bracket.

may comprise plates 25 and 26 rigidly maintained in parallelism, as by a cross-piece 27 'at a small end lon'gi ceivable through correspondinglyvertically spaced, square and 24 of the 1 he apertures the channels: 15 and 16 so that the bracket may be adjusted to various heights within a wide range including substantially the apertures 31, 31 through the walls 23 channels 15 and 16 (see Figures 5 and 6). 31 are provided along the entire length of full height of the support.

Although downward load stresses on the support 10 in use tends to urge the braces 13 and 14 together to maintain the bracket 22 in positively supported position,v as a safeguard against accidental dislodgement of the bracket, removable locking pins 32, 32 may be inserted. 33, 33 in the extensions of the square pin.

apertures 23, laterally outwardly of the walls 23 and 24.

With the bracket 22 thus rigidly mounted on its sup-- port It), to be in cooperation with other supports as shown in Figure l, a ledger 11, such as a length two-bysix lumber, is receivable downwardly between the braces 13 and 14, and between the bracket plates 25 and 26 to; be supported on longitudinally spaced bolts 35, 35 re-- ceiv ed through apertures in the plates 25 and 26, to have the threaded ends of the bolts projected through plate: 26, the bolts being welded to the bracket to prevent rota- 1 tion relative thereto.

For maintaining the ledger rigidly supported against collapse with respect to the support 10, means is pro- 'vided for gripping the ledger at widely spaced points: longitudinally of the same. To this end, as best shown in;

Figure 7, each bolt 35 has its projecting threaded end! received through a clamping lever 36 suitably pivoted! at one end 35a to plate 26, .theother end of the lever having a pointed portion 37 inturned through a hole 38'; in plate 26, to be urged, by turning a handled nut 39 threaded on the bolt 35, toward embedded engagement; with the ledger 11, which at the same time is otherwisefirmly clamped against the plate 25. This two-point embedded engagement of the levers 36 in effect provides; a rigid brace between the support and the ledger.

In use, four such supports 10 are provided for build ing a scaffold, the brackets 22 of each support 10 being: adjusted thereon to predetermined height by positioning: thesam'e betweenthe braces 13 and 14 while in separated condition as shown in Figure 3, and then pivoting the braces toward each other to engage the series of vertically spaced protuberances 30 at each side of the respec-- tive bracket outwardly through corresponding vertically spaced apertures 31 in the webs or walls 23 and 24 of the vertical channels 13 and 14, as shown in the closed po-- sition of Figures 2, 5 and 6. The locking pins 32 are then placed in the apertures 33 of the square pin 28, to prevent accidental separation of the braces from the pos-- itive locking positions thereof with the bracket.

With the bracket 22 thusrigidlymounted on the respective support 10, a corresponding end of a two-by-six ledger 11 isinsert'ed in the space between the braces 13 a'iid'14, and downwardly to supporting engagementwith the bracket pins 35 and 36. i V p are turned to fulcrum the levers 36 inwardly to embed the plates and welded thereto Next, I the handled nuts 39 adjusted to different heights.

the points 37 in the ledger, thereby rigidly clamping the same within the bracket. The other supports are similarly assembled with respect to corresponding ends of the ledgers to provide two trestles for the foot-board 12, as shown in Figure l.

'The scaffolding is similarly readily disassembled or it will be seen that the platform or foot-board 12 is vertically adjustable to heights slightly above floor level to approximately the height of the supports 10. Thus, if the supports are six feet high, for example, the platform may be adjusted from a low level of approximately eighteen inches to a high level of approximately six feet. The assembled scaffolding is safe against collapsing because the brackets are positively locked on the support braces 22 by the locking pins 32 (Figure 6), and by the pointed ends 37 of clamping levers 36 being clampingly embedded at widely spaced points at each corner of the scaffold.

Modifications of the invention may be resorted to without departing from the spirit thereof or the scope of the appended claims.

What is claimed is:

l. A support for a scaffold ledger, comprising a pair of laterally oppositely disposed supporting braces provided with an exceptionally wide base and having laterally vertical opposing walls in parallelism to define a vertical space therebetween, means releasably securing said braces to each other against lateral movement in either direction and to have said opposing walls in laterally spaced parallelism, a bracket received in said space between said spaced walls and being elongated to extend freely from the braces in longitudinal direction angularly of a vertical plane laterally through s"id braces, and means on said walls and said bracket selectively intercngageable to support the bracket at various heights on the braces when the braces are secured to each other, said bracket having a longitudinally extending seat portion for removably receiving a substantial length of a said scaffold ledger, said bracket having releasable gripping means thereon for gripping said substantial length of scaffold ledger to support the same rigidly braced with respect to said braces.

2. A support for a scaffold ledger, comprising a pair of laterally oppositely disposed supporting braces provided with a substantially wide base and having laterally spaced substantially parallel vertical walls defining a vertical space therebetween, means pivotally connecting said braces together at the lower ends of said Walls, a bracket received in said vertical space between said spaced walls and being elongated to extend freely in longitudinal direction angularly of a vertical plane through the brackets, means on said walls and said bracket selectively intereugageable to support the brackets at various heights on the braces, said bracket having a longitudinally extending seat portion for load-supporting reception of substantial length of a said scafl old ledger, adjustable clamping means on said bracket adjustable to clamp a said ledger along said length thereof rigidly to brace the same with respect to said braces, and releasable means for retaining said braces with said walls thereof in said substantial parallelism.

3. A support for a scaffold ledger, comprising a pair of laterally oppositely disposed supporting braces, including laterally spaced vertical walls in substantial parallelism defining a vertical space therebetween, said walls having vertically spaced apertures in the same, means connecting said braces to be movable laterally apart to widen said space between said walls, a bracket received in said space between said spaced walls and being elongated to extend freely in longitudinal direction angularly of a vertical plane laterally through said braces, and vertically spaced protuberances at each side of said bracket selectively receivable in corresponding said apertures of the respective braces in said laterally spaced relation of thc fl'alls to support the bracket at various adjusted heights on the braces, releasable means for locking said braces together with said bracket vertically adjusted in place in said space between the same, said bracket having a longitudinally extending seat portion for loadsupporting reception of a substantial length of a said scaffold ledger, and adjustable clamping means being provided at longitudinally spaced points on the bracket and clampingly adjustable to apply restraining pressure to a said substantial length of scaffold ledger to brace the same in rigidly gripped condition on the bracket and thereby to prevent collapse of the ledger with respect to the braces.

4. A support for a scaffold ledger, comprising a pair of laterally oppositely disposed supporting braces, including laterally spaced vertical walls defining a vertical space therebetween, said walls having vertically spaced apertures in the same, means connecting said braces whereby the same are movable apart, a bracket of sub stantial length received in said space between said spaced walls to extend longitudinally at a substantial angle to a vertical plane laterally through said braces, and vertically spaced protuberances at each side of said bracket selectively receivable in corresponding said apertures of the respective braces to support the bracket at various adjusted heights on the braces, said bracket including seating portions and spaced sidewalls extending upwardly at opposite sides thereof between which a said scaffold ledger is downwardly receivable for support on said seating portions, at least one said protuberance on each side of the bracket having locking means thereon to be outwardly of said vertical walls when in said spaced relation thereof and thereby lock said braces with said walls thereof in said spaced relation.

5. A support for a scaffold ledger, comprising a pair of laterally oppositely disposed supporting braces, including laterally spaced vertical walls defining a vertical space therebetween, said walls having vertically spaced apertures in the same, means connecting said braces whereby the same are movable laterally apart to widen said space between said walls, a bracket received in said space between said walls to extend longitudinally at a substantial angle to a vertical plane laterally through said braces, and vertically spaced protubcranccs at each side of said bracket selectively receivable in corresponding said apertures of the respective braces in said laterally spaced relation of the walls to support the bracket at various adjusted heights on the braces, said bracket having a portion for supporting reception of a said scaffold ledger, and adjustable clamping means being provided at longitudinally spaced points on the bracket and clampingly adjustable to apply restraining pressure to a said scaffold ledger to brace the same rigidly against collapsing with respect to the braces, releasable locking means being provided for locking said bracket to said braces in the various positions of vertical adjustment of the bracket with said walls thereof in said spaced relation.

6. A support for a scaffold ledger, comprising a pair of laterally oppositely disposed supporting braces, including laterally spaced vertical walls defining a vertical space therebetween, said walls having vertically spaced apertures in the same, means pivotally connecting said braces adjacent the lower ends thereof whereby said braces are pivotable about said pivotally connecting means to widen said space between said walls, a bracket received in said space between said walls, and vertically spaced protuberances at each side of said bracket selectively rcceivable in corresponding said apertures of: the respective braces in said laterally spaced relation of the walls to support the bracket at various adjusted heights on the braces, said bracket having a portion for supporting reception of a said scaffold ledger thereon, said bracket including spaced sidewalls between which a said scaffold ledger is supportingly receivable, at least one said protuberance on each side of the bracket being apertured to be presented outwardly of said vertical walls when in said 5 spaced relation thereof, and locking pin means being removably received in the apertures of said protuberances to be at the outer side of said vertical walls and thereby to lock said braces with said walls thereof in said spaced relation.

References Cited in the file of this patent UNITED STATES PATENTS 574,486 Jones Ian. 5, 1897 6 Cantrell June 23, 1903 Trautwein July 24, 1917 Pepin Sept. 11, 1917 Plass June 23, 1925 Roberts Jan. 19, 1932 Logan et al. Oct. 11, 1932 FOREIGN PATENTS Austria June 10, 1910 

